Old bodies final destination

I wonder where all the old bodies like D1, D1H, D1X, D2H, D2X, etc finally end up?

I bet most of them never reached the shutter end of life and are still in perfect working order. I myself have a D2X and several D2H, but I still use them along the newer bodies.

Those bodies do not make much sense for the beginners as there are better options, for the enthusiasts and pros there are definitely much better options, so my question, where do you think most of those older bodies und up?